Mercurial > sdl-ios-xcode

annotate src/video/win32/SDL_win32shape.c @ 5004:0c72ae7b7cb2

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Added native atomic operations for Windows, Mac OS X, and gcc compiler intrinsics. Changed the CAS return value to bool, so it's efficient with OSAtomicCompareAndSwap32Barrier() Added an atomic test adapted from code by Michael Davidsaver
author Sam Lantinga <slouken@libsdl.org>
date Sun, 16 Jan 2011 15:16:39 -0800
parents 10b96029e734
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 2010 Eli Gottlieb
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Lesser General Public License for more details.
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14
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15 You should have received a copy of the GNU Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
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19 Eli Gottlieb
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20 eligottlieb@gmail.com
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21 */
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22
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23 #include <stdio.h>
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24 #include "SDL_assert.h"
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25 #include "SDL_win32shape.h"
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26 #include "SDL_win32video.h"
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27
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28 SDL_WindowShaper*
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29 Win32_CreateShaper(SDL_Window * window) {
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30 int resized_properly;
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31 SDL_WindowShaper* result = (SDL_WindowShaper *)SDL_malloc(sizeof(SDL_WindowShaper));
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32 result->window = window;
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33 result->mode.mode = ShapeModeDefault;
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34 result->mode.parameters.binarizationCutoff = 1;
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35 result->userx = result->usery = 0;
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36 result->driverdata = (SDL_ShapeData*)SDL_malloc(sizeof(SDL_ShapeData));
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37 ((SDL_ShapeData*)result->driverdata)->mask_tree = NULL;
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38 //Put some driver-data here.
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39 window->shaper = result;
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40 resized_properly = Win32_ResizeWindowShape(window);
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41 if (resized_properly != 0)
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42 return NULL;
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43
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44 return result;
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45 }
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46
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47 void
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48 CombineRectRegions(SDL_ShapeTree* node,void* closure) {
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49 HRGN mask_region = *((HRGN*)closure),temp_region = NULL;
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50 if(node->kind == OpaqueShape) {
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51 //Win32 API regions exclude their outline, so we widen the region by one pixel in each direction to include the real outline.
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52 temp_region = CreateRectRgn(node->data.shape.x,node->data.shape.y,node->data.shape.x + node->data.shape.w + 1,node->data.shape.y + node->data.shape.h + 1);
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53 if(mask_region != NULL) {
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54 CombineRgn(mask_region,mask_region,temp_region,RGN_OR);
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55 DeleteObject(temp_region);
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56 }
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57 else
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58 *((HRGN*)closure) = temp_region;
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59 }
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60 }
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61
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62 int
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63 Win32_SetWindowShape(SDL_WindowShaper *shaper,SDL_Surface *shape,SDL_WindowShapeMode *shape_mode) {
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64 SDL_ShapeData *data;
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65 HRGN mask_region = NULL;
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66
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67 if (shaper == NULL || shape == NULL)
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68 return SDL_INVALID_SHAPE_ARGUMENT;
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69 if(shape->format->Amask == 0 && shape_mode->mode != ShapeModeColorKey || shape->w != shaper->window->w || shape->h != shaper->window->h)
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70 return SDL_INVALID_SHAPE_ARGUMENT;
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71
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72 data = (SDL_ShapeData*)shaper->driverdata;
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73 if(data->mask_tree != NULL)
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74 SDL_FreeShapeTree(&data->mask_tree);
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75 data->mask_tree = SDL_CalculateShapeTree(*shape_mode,shape);
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76
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77 SDL_TraverseShapeTree(data->mask_tree,&CombineRectRegions,&mask_region);
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78 SDL_assert(mask_region != NULL);
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79
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80 SetWindowRgn(((SDL_WindowData *)(shaper->window->driverdata))->hwnd, mask_region, TRUE);
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82 return 0;
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83 }
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84
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85 int
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86 Win32_ResizeWindowShape(SDL_Window *window) {
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87 SDL_ShapeData* data;
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88
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89 if (window == NULL)
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90 return -1;
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91 data = (SDL_ShapeData *)window->shaper->driverdata;
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92 if (data == NULL)
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93 return -1;
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95 if(data->mask_tree != NULL)
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96 SDL_FreeShapeTree(&data->mask_tree);
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97 if(window->shaper->hasshape == SDL_TRUE) {
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98 window->shaper->userx = window->x;
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99 window->shaper->usery = window->y;
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100 SDL_SetWindowPosition(window,-1000,-1000);
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101 }
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103 return 0;
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104 }